Optical properties of wavelength-tunable green-emitting color conversion glass ceramics

摘要

Color conversion glass ceramics are prepared by cosintering borosilicate glass frits and green0.06Ce:Y_(2.94)(Al_(1-x)Ga_x)_5O_(12) phosphors.The crystal structures,the influence of Ga concentration on the photoluminescence(PL),and reliability properties of the color conversion glass ceramics are investigated.The PL emission wavelengths of 0.06Ce:Y_(2.94)(Al_(1-x)Ga_x)_5O_(12) glass ceramics show blue shift from 545 nm to 525 nm with increasing Ga content(x value)under excited at 460 nm.Reliability test results show that the quantum yield(QY)of0.06Ce:Y_(2.94)(Al_(1-x)Ga_x)_5O_(12) glass ceramics decreases from 70.60%to 59.06%with x value increasing from 0.15 to0.35 under the ambient condition of 85~?C/RH85%for the exposure time of 168 h.And the quantum yield(QY)of0.06Ce:Y_(2.94)(Al_(1-x)Ga_x)_5O_(12) glass ceramics decreases from 65.13%to 52.23%after being soaked into boiled water for 4 h.The finding reveals that the addition of Ga can deteriorate the reliability of the color conversion glass ceramics.